diff --git a/README.md b/README.md
index 8f983e3..dec08e4 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,8 @@
 
 Visualizes paradigmatic and syntagmatic relations between words based on  [wang2vec](https://github.com/wlin12/wang2vec) / structured skip-n-gram (Ling et al. 2015) word embeddings (Mikolov et al. 2013) and word embedding networks.
 
+A query can be a vector expression: `König - Mann + Frau` is answered with the neighbours of the position that arithmetic yields, and with the contexts that position predicts. See [the `word` parameter](#the-word-parameter).
+
 DeReKoVecs (Fankhauser / Kupietz 2017, 2019, 2022; Kupietz et al. 2018) serves as part of the new open lab of the Corpus Linguistics group at IDS Mannheim. Similar to the
 Collocation Database [CCDB](http://corpora.ids-mannheim.de/) (Keibel / Belica 2007, Belica 2011), DeReKoVecs serves for investigating and comparing
 of measurements, dimension reduction procedures, visualizations etc., to track down detailed paradigmatic and syntagmatic relations
@@ -11,7 +13,7 @@
 
 ### Dependencies
 
-* [libcollocatordb](https://korap.ids-mannheim.de/gerrit/plugins/gitiles/ids-kl/collocatordb) >= v1.5.0 (which builds against the rocksdb of the distribution, no rocksdb 5.11 from source needed)
+* [libcollocatordb](https://korap.ids-mannheim.de/gerrit/plugins/gitiles/ids-kl/collocatordb) >= v1.8.0 (which builds against the rocksdb of the distribution, no rocksdb 5.11 from source needed). `Makefile.PL` refuses to build against an older one: Log-Dice follows Rychlý's definition from 1.8.0 on, and the interface would show the previous values under the current explanations.
 
 ### Build and install
 
@@ -142,7 +144,7 @@
 
 ## Web Service API
 
-In addition to the web user interface, derekovecs also provides a web api which is however still very unsystematic and **not stable**. To figure out the meaning of still undocumented result components, have a look at the table head mouse-overs in the GUI or at the source code around [here](https://korap.ids-mannheim.de/gerrit/plugins/gitiles/ids-kl/derekovecs/+/refs/heads/master/templates/index.html.ep#684).
+In addition to the web user interface, derekovecs also provides a web api which is however still very unsystematic and **not stable**. To figure out the meaning of still undocumented result components, have a look at the table head mouse-overs in the GUI or at the source code around [here](https://korap.ids-mannheim.de/gerrit/plugins/gitiles/ids-kl/derekovecs/+/refs/heads/master/templates/index.html.ep#938), where the table heads carry them.
 
 | Command                   | Parameters                      | Description                                                       |
 |---------------------------|---------------------------------|-------------------------------------------------------------------|
@@ -177,6 +179,51 @@
 returned in `unknown`; `operands` is the number of operands the query vector
 was built from.
 
+#### Result of `/?word=…&json=1`
+
+```jsonc
+{
+   "word" : "Grund",           // the query as it was parsed
+   "operands" : 1,             // operands the query vector was built from,
+                               // for the first "|" separated part
+   "unknown" : "",             // blank separated query tokens that are not
+                               // in the vocabulary and were left out
+   "list" : [                  // one array per "|" separated part
+      [
+         {
+            "word" : "Grund",
+            "rank" : 492,      // frequency rank in the vocabulary
+            "dist" : 0.99999976, // cosine similarity to the query vector
+            "vector" : []      // the length normalized embedding
+         }
+      ]
+   ],
+   "collocators" : [           // predictive collocates of the query vector,
+                               // null for a model without a .net file
+      {
+         "word" : "dafür",
+         "rank" : 243,         // frequency rank in the vocabulary
+         "dot" : 4.006,        // max(z): highest score before the sigmoid,
+                               // q . syn1neg[collocate, position]
+         "max" : 0.98129,      // max(a): the same maximum after it. Read from
+                               // a table quantizing z in steps of 1/83 and
+                               // capping it at 6, so collocates can share a
+                               // max(a) but not a max(z)
+         "average" : 0.09813,  // mean activation over the auto focus positions
+         "prob" : 3.0353e-4,   // activation sum over the auto focus positions,
+                               // normalized by their total activation
+         "cprob" : 3.0353e-4,  // co-norm of the column normalized activations
+                               // over the auto focus positions
+         "overall" : 3.0365e-5,// activation sum over the whole window,
+                               // normalized by the total window sum
+         "pos" : 16,           // binary encoded auto focus positions
+         "heat" : []           // per position maximum activation, left to
+                               // right, the node in the middle
+      }
+   ]
+}
+```
+
 ### Get classical (count-based) collocates
 
 | Command      | Parameters | Description |
@@ -226,7 +273,7 @@
 
 | Command                    | Parameters              | Description                                                |
 |----------------------------|-------------------------|------------------------------------------------------------|
-| /getPosWiseW2VCollocators  | w(,max=200,format=json) | get top `max`predictive collocates position-wise  of word w |
+| /getPosWiseW2VCollocators  | w(,max=200,cutoff=750000,threshold=0.2,format=json) | get top `max` predictive collocates position-wise of the query `w`, which may be a vector expression |
 
 
 ### Examples
@@ -258,13 +305,32 @@
 docker build -t idscorpuslinguistics/derekovecs .
 ```
 
-### Optional: Slim down image using [Slim(toolkit)](https://github.com/slimtoolkit/slim)
+### Optional: Slim down the image using [mint](https://github.com/mintoolkit/mint)
+
+The released image is built in three steps, as in the
+[CI pipeline](.gitlab-ci.yml). mint keeps what the server touches while it is
+running, so it needs a model to probe: the example models stay in the first
+image and are removed again in the last step.
 
 ```bash
-slim build --include-path /usr/local/share/perl5 --mount ./example-models:/example-models:z --env MOJO_CONFIG=/example-models/example-docker.conf idscorpuslinguistics/derekovecs
+# 1. build with the example models still in place
+sed -e 's/RUN rm -rf example-models//' Dockerfile > Dockerfile.large
+docker build -f Dockerfile.large -t idscorpuslinguistics/derekovecs:large .
+
+# 2. run the server, probe it over HTTP and drop everything it did not touch
+docker run --rm -v /var/run/docker.sock:/var/run/docker.sock mintoolkit/mint \
+  --crt-api-version 1.46 build --http-probe=true --http-probe-start-wait 60 \
+  --include-workdir=true --include-path=/usr/local \
+  --env MOJO_CONFIG=/derekovecs/example-models/example-docker.conf \
+  --tag idscorpuslinguistics/derekovecs:tmp \
+  idscorpuslinguistics/derekovecs:large
+
+# 3. remove the example models and the toolchain mint kept
+docker build -f Dockerfile.remove-example-data -t idscorpuslinguistics/derekovecs .
 ```
 
-Will build an image `ids-kl/derekovecs.slim` reduced to ~25% of the original size.
+mint takes the image from about 715 MB to 290 MB, and dropping the example
+models afterwards leaves about 109 MB.
 
 ### Run docker image
 
@@ -286,7 +352,7 @@
 
 **Contributors**: [Peter Fankhauser](https://www.ids-mannheim.de/digspra/personal/fankhauser.html), [Rainer Perkuhn](https://www.ids-mannheim.de/digspra/personal/perkuhn.html), [Tim Feldmüller](https://www.ids-mannheim.de/digspra/personal/feldmueller.html)
 
-Copyright (c) 2016-2024, [Leibniz Institute for the German Language](http://www.ids-mannheim.de/), Mannheim, Germany
+Copyright (c) 2016-2026, [Leibniz Institute for the German Language](http://www.ids-mannheim.de/), Mannheim, Germany
 
 DeReKoVecs is published under the [Apache 2.0 License](LICENSE).